RANCHO RS9000XL Adjustable Shocks -Set - 01-10 CHEVROLET 2500HD 4WD Part Numbers RS999274 and RS999288 Set of 4 Shocks for vehicles at factory height or w/0" front Lift and w/0" rear Lift Fits 2WD & 4WD vehicles All necessary washers, bushings, and nuts included. Factory shock mounting bolts are reused for installation. Rancho's limited lifetime warranty protects against defects and premature failure. Rancho's 90 day ride guarantee covers RS5000X, RS7000MT, and RS9000XL shocks.